<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
    <todo>
        <todo-title slot="todo-title" v-bind:title="title"></todo-title>
        <todo-items slot="todo-items" v-for=" itemtestfor in todoItems" v-bind:item1="itemtestfor"></todo-items>
    </todo>
</div>
</body>
<script src="vue.js"></script>

<script>

    Vue.component("todo", {
        template:
            '<div>' +
            '<slot name="todo-title" > </slot>' +
            '<ul>' +
            '<slot name="todo-items"> </slot>' +
            '</ul>' +
            '</div>'
    })

    Vue.component("todo-title", {
        props: ['title'],
        template: '<div>{{title}}</div>'
    })

    Vue.component("todo-items", {
        props: ['item1'],
        template: '<li>{{item1}}  <button @click="remove">delete</button> </li>',
        methods: {
            remove: function (index) {
                //自定义一个事件
                this.$emit("remove",index)

            }
        }
    })

    new Vue({
        el: '#app',
        data: {
            title: "何智勤的书籍",
            todoItems: ['狂神说Java', '狂神说运维', '狂神说前端']
        },
        methods: {

            sayhi: function (){
                alert('hello')
            },

            removeitems: function (index){
                console.log("删除了"+ this.todoItems[index] +"OK");
                this.todoItems.splice(index,1); //一次删除一个元素
            }

        }
    })
</script>
</html>